夺回孤山的“矮人王”索林顺理成章的占据了无数远古矮人的财宝，同时这些堆积如山的财宝也吸引着人类勇士巴德和精灵王瑟兰迪尔所率的联军，矮人一族面临着一场巨大的危机。随后冲着无尽财宝而来的半兽人大军蜂拥而至，面对这些邪恶、贪婪的半兽人，与人类和精灵联军对峙已久的矮人一族也终于放下隔阂，在“矮人王”索林的率领下与人类、精灵歃血为盟，共同对抗半兽人部队。

被吵醒的史矛革大闹长湖镇，最终为人类巴德（卢克·伊万斯 Luke Evans 饰）射杀。索林·橡木盾（理查德·阿米蒂奇 Richard Armitage 饰）多年的夙愿终于实现，孤山埃尔波尔重新回到矮人手中。然而这位矮人王子仿佛被史矛革的贪婪和堆成山的黄金迷惑了心窍，他 疯狂地搜寻象征王位的阿肯宝石，不仅撕毁了付给长湖镇报酬的约定，更拒绝了精灵王（李·佩斯 Lee Pace 饰）索要本族国宝的要求，为此导致三族的战争一触即发。与此同时，苍白半兽人阿索格率领大军浩浩荡荡向孤山逼近。得知消息的灰袍巫师甘道夫（伊恩·麦凯伦 Ian McKellen 饰）从中调停斡旋，而被索林视为唯一朋友的霍比特人比尔博·巴金斯（马丁·弗里曼 Martin John C. Freeman 饰）则掌握着中土命运的关键。五军会战，爆发在即！ 　　本片根据J.R.R·托尔金的同名原著改编，为霍比特人系列的最后一部。

作为三部曲的终结篇，本片承接前作剧情：矮人们组成的远征小分队，在历尽千辛万苦，终于重返孤山。在夺回了家园的同时，他们却无意在之间也释放出了一股…

Bilbo Baggins the Hobbit was just minding his own business, when his occasional visitor Gandalf the Wizard drops in one night. One by one, a whole group of dwarves drop in, and before he knows it, Bilbo has joined their quest to reclaim their kingdom, taken from them by an evil dragon named Smaug. The only problem is that Gandalf has told the dwarves that Bilbo is an expert burglar, but he isn't....

Bilbo Baggins the Hobbit was just minding his own business, when his occasional visitor Gandalf the Wizard drops in one night. One by one, a whole group of dwarves drop in, and before he knows it, Bilbo has joined their quest to reclaim their kingdom, taken from them by an evil dragon named Smaug. The only problem is that Gandalf has told the dwarves that Bilbo is an expert burglar, but he isn't....

成功到达雾山后，甘道夫与矮人远征队分道扬镳，索林一行人必须独自面对幽林带来的危险，在这里他们将碰到精灵一族。当他们顺利穿越幽林来到孤山脚下的长湖镇，他们必须躲过恶龙史矛革的监视，找到进入孤山的秘密之门……

成功到达雾山后，甘道夫与矮人远征队分道扬镳，索林一行人必须独自面对幽林带来的危险，在这里他们将碰到精灵一族。当他们顺利穿越幽林来到孤山脚下的长湖镇，他们必须躲过恶龙史矛革的监视，找到进入孤山的秘密之门……

据英国作家J.R.R·托尔金1937年出版的同名长篇小说改编。又名《哈比特人历险记》或《去而复返-一个霍比特人的故事》。（原著中由比尔博本人亲自撰写。）…